Mix and match: what is the best R&D recipe for eco-innovation?
研究企业如何组合绿色与非绿色研发投资以促进生态创新，发现绿色研发有价值但需与其他知识互补，为政策制定者和企业提供研发投资建议。
Eco-innovation is a complex activity that requires diverse knowledge and an extensive R&D and technology portfolio. This paper investigates the strategies employed by firms and the extent to which green and non-green R&D can influence eco-innovation. We address two research questions: Is investment in green R&D valuable and sufficient for successful eco-innovation? What types of investment are needed for eco-innovation? Our findings provide a better understanding of the mix of knowledge fields required for eco-innovation. To investigate internal firm R&D strategies we use unique data that allow us to identify the influence of the stocks of green and non-green R&D on eco-innovation and the importance of complementarity among specific R&D strategies and knowledge for eco-innovation. Our findings will be relevant for policymakers and firms, to promote investment in R&D to enable eco-innovation and ensure a quick transition to a green society.